<?php
/** 
 * Twitter 操作类 
 * 
 * @package sae 
 * @author Easy Chen 
 * @version 1.0 
 */ 
class twitterClient
{ 
    
	// 构造函数 
    function __construct( $akey , $skey , $accecss_token , $accecss_token_secret ) 
    { 
        $this->oauth = new twitterOAuth( $akey , $skey , $accecss_token , $accecss_token_secret ); 
    }
	
    // 最新关注人微博 
    function home_timeline() 
    { 
        return $this->oauth->get('http://api.twitter.com/1/statuses/home_timeline.json'); 
    }

    // 发表微博(文本、图片)
    function update( $text, $value = '' )
    {  
        $param = array(); 
        $param['status'] = $text; 

		if ($value[0] == "image" && $value[1]) {
			$param['media[]'] = $value[1];
			return $this->oauth->post( 'https://upload.twitter.com/1/statuses/update_with_media.json' , $param , true );
		} else {
            return $this->oauth->post( 'http://api.twitter.com/1/statuses/update.json' , $param ); 
		}
    }

    // 获取自己信息
    function verify_credentials() 
    { 
        return $this->oauth->get( 'http://api.twitter.com/1/account/verify_credentials.json' );
    }

}

/** 
 * Twitter OAuth 认证类 
 * 
 * @package sae 
 * @author Easy Chen 
 * @version 1.0 
 */ 
class twitterOAuth {
  /* Contains the last HTTP status code returned. */
  public $http_code;
  /* Contains the last API call. */
  public $url;
  /* Set up the API root URL. */
  public $host = "https://api.twitter.com/1/";
  /* Set timeout default. */
  public $timeout = 30;
  /* Set connect timeout. */
  public $connecttimeout = 30; 
  /* Verify SSL Cert. */
  public $ssl_verifypeer = FALSE;
  /* Respons format. */
  public $format = 'json';
  /* Decode returned json data. */
  public $decode_json = false;
  /* Contains the last HTTP headers returned. */
  public $http_info;
  /* Set the useragnet. */
  public $useragent = 'TwitterOAuth v0.2.0-beta2';
  /* Immediately retry the API call if the response was not successful. */
  //public $retry = TRUE;

  /**
   * Set API URLS
   */
  function accessTokenURL()  { return 'https://api.twitter.com/oauth/access_token'; }
  function authenticateURL() { return 'https://api.twitter.com/oauth/authenticate'; }
  function authorizeURL()    { return 'https://api.twitter.com/oauth/authorize'; }
  function requestTokenURL() { return 'https://api.twitter.com/oauth/request_token'; }

  /**
   * Debug helpers
   */
  function lastStatusCode() { return $this->http_status; }
  function lastAPICall() { return $this->last_api_call; }

  /**
   * construct TwitterOAuth object
   */
  function __construct($consumer_key, $consumer_secret, $oauth_token = NULL, $oauth_token_secret = NULL) {
    $this->sha1_method = new OAuthSignatureMethod_HMAC_SHA1();
    $this->consumer = new OAuthConsumer($consumer_key, $consumer_secret);
    if (!empty($oauth_token) && !empty($oauth_token_secret)) {
      $this->token = new OAuthConsumer($oauth_token, $oauth_token_secret);
    } else {
      $this->token = NULL;
    }
  }


  /**
   * Get a request_token from Twitter
   *
   * @returns a key/value array containing oauth_token and oauth_token_secret
   */
  function getRequestToken($oauth_callback = NULL) {
    $parameters = array();
    if (!empty($oauth_callback)) {
      $parameters['oauth_callback'] = $oauth_callback;
    } 
    $request = $this->oAuthRequest($this->requestTokenURL(), 'GET', $parameters);
    $token = OAuthUtil::parse_parameters($request);
    $this->token = new OAuthConsumer($token['oauth_token'], $token['oauth_token_secret']);
    return $token;
  }

  /**
   * Get the authorize URL
   *
   * @returns a string
   */
  function getAuthorizeURL($token, $sign_in_with_twitter = TRUE) {
    if (is_array($token)) {
      $token = $token['oauth_token'];
    }
    if (empty($sign_in_with_twitter)) {
      return $this->authorizeURL() . "?oauth_token={$token}";
    } else {
       return $this->authenticateURL() . "?oauth_token={$token}";
    }
  }

  /**
   * Exchange request token and secret for an access token and
   * secret, to sign API calls.
   *
   * @returns array("oauth_token" => "the-access-token",
   *                "oauth_token_secret" => "the-access-secret",
   *                "user_id" => "9436992",
   *                "screen_name" => "abraham")
   */
  function getAccessToken($oauth_verifier = FALSE) {
    $parameters = array();
    if (!empty($oauth_verifier)) {
      $parameters['oauth_verifier'] = $oauth_verifier;
    }
    $request = $this->oAuthRequest($this->accessTokenURL(), 'GET', $parameters);
    $token = OAuthUtil::parse_parameters($request);
    $this->token = new OAuthConsumer($token['oauth_token'], $token['oauth_token_secret']);
    return $token;
  }

  /**
   * One time exchange of username and password for access token and secret.
   *
   * @returns array("oauth_token" => "the-access-token",
   *                "oauth_token_secret" => "the-access-secret",
   *                "user_id" => "9436992",
   *                "screen_name" => "abraham",
   *                "x_auth_expires" => "0")
   */  
  function getXAuthToken($username, $password) {
    $parameters = array();
    $parameters['x_auth_username'] = $username;
    $parameters['x_auth_password'] = $password;
    $parameters['x_auth_mode'] = 'client_auth';
    $request = $this->oAuthRequest($this->accessTokenURL(), 'POST', $parameters);
    $token = OAuthUtil::parse_parameters($request);
    $this->token = new OAuthConsumer($token['oauth_token'], $token['oauth_token_secret']);
    return $token;
  }

  /**
   * GET wrapper for oAuthRequest.
   */
  function get($url, $parameters = array()) {
    $response = $this->oAuthRequest($url, 'GET', $parameters);
    if ($this->format === 'json' && $this->decode_json) {
      return json_decode($response);
    }
    return $response;
  }
  
  /**
   * POST wrapper for oAuthRequest.
   */
  function post($url, $parameters = array() , $multi = false) { 
	  $response = $this->oAuthRequest($url, 'POST', $parameters , $multi ); 
      if ($this->format === 'json' && $this->decode_json) { 
		  return json_decode($response, true); 
      } 
	  return $response; 
    }

  /**
   * DELETE wrapper for oAuthReqeust.
   */
  function delete($url, $parameters = array()) {
    $response = $this->oAuthRequest($url, 'DELETE', $parameters);
    if ($this->format === 'json' && $this->decode_json) {
      return json_decode($response);
    }
    return $response;
  }

  /**
   * Format and sign an OAuth / API request
   */
  function oAuthRequest($url, $method, $parameters , $multi = false) {
    if (strrpos($url, 'https://') !== 0 && strrpos($url, 'http://') !== 0) {
      $url = "{$this->host}{$url}.{$this->format}";
    }
    $request = OAuthRequest::from_consumer_and_token($this->consumer, $this->token, $method, $url, $parameters);
    $request->sign_request($this->sha1_method, $this->consumer, $this->token);
    switch ($method) {
    case 'GET':
      return $this->http($request->to_url(), 'GET');
    default:
      return $this->http($request->get_normalized_http_url(), $method, $request->to_postdata($multi), $multi);
    }
  }

  /**
   * Make an HTTP request
   *
   * @return API results
   */
	function http($url, $method, $postfields = null , $multi = false) {
		$params = array(
			"method" => $method,
			"timeout" => $this -> timeout,
			"user-agent" => $this -> useragent,
			"sslverify" => $this -> ssl_verifypeer,
			"body" => $postfields,
			"headers" => ($multi) ? array("Content-Type" => "multipart/form-data; boundary=" . OAuthUtil :: $boundary , "Expect: ") : ''
		);
		return class_http($url, $params);
	}
}